Chaiyaporn Pomchaitawat. (1993) A study to improve abrasion resistance of natural rubber. Mahidol University,:ม.ป.ท.Chaiyaporn Pomchaitawat. 1993. A study to improve abrasion resistance of natural rubber. ม.ป.ท.:Mahidol University,;Chaiyaporn Pomchaitawat. A study to improve abrasion resistance of natural rubber. ม.ป.ท.:Mahidol University, 1993. Print.